cannon



March 3, 1931. J. w. CANNN .1,794,442

VALVE Filed Jan. 9. 192e v i l//// l////// Patented Mar. 3, 1931 PATENTt OFFICE JOHNv W. CANNON, -OF PROVIDENCE, RHODE ISLAND VALVE `Applcationiled yJanuary 9,

j This invention'relates to valves of the type that are knowntoiheftrade as rising-stem valves, wherein the flow of fluidthrough suchvalve is controlled by raising and lowering a valve stem provided withapo'rt adapted to register with a passage in the valve body. It is thegeneral purpose and object of the invention to provide a valveof thischaracter which is efficient insop'eration'and which 'may beconveniently and'accurately adjusted; also 'to provide 'such valvewthcooperating construction of valve-body portand valve-stem port thatwillprevent thejcloggingfbysediment of thepassage-provided by saidports. A still further object of the inventionis to improve'andsimplifythe construction of valves ofthis character. 57. Il accomplish theforegoing andv other ob-y y jects by means of the constructionEanfdQar-v rangement of partsy shown in the drawings wherein Fig. 1'representsfa side elevation'o a valve constructed inlaccordance with myinvention;v` Fig. 2 a. side yelevation takenfat right angles to Figi;yFig'.` 3 a detail invertifcal vsection taken; on theline 3-3 'of `Fig.2; F ig. v4ta View-similar to Fig.V 3, taken on the linea-44 ofFigQjl;Fig. 5 a detail in`lsection taken on: the line v5 5y ovfliglfl; andFig.y Gis ya fragmentary section? showing the intersection of the Vports10'and l1 'in' an intermediateposition f i Describing the various partsherein V,by reference characters, l'denotes the valvel body generally,the same being in the fform -of a T having a'longitudinal bore 2therethrough, the ends ofl which bore-terminate in connections3 and3?,said yconnections being internally threaded forth'ereception of pipes(not shown). From theupper partf'of the body there extends a sleeve-1Ltffhaving its upper end externally threaded, as shown atb, the sleeveyhaving therein achamber, the bottom of which is tapered, as shown at6tfoward a bore or guide 7 for ,the valveI 'steml 8, which stem crossesthe bore.2,1thelo'Wer,y end of said stem being received ,within a seat1'? provided by the bottom ofthe bore? 'below the 'bore 2.' Extending`at* right angles to the Yconnections 3 and3l isA anoutlet connectionQhavng 50 its interior threaded for the reception of a 192s. serial no.245,360.

pipe (not shown). From such connection a porti() extends tothe verticalbore 7 provided Vin thevalve body 1, the valve stem being provided witha port 11 adapted to register atits outer end with the port 10 andregistering y at its inner end with a large through channel 8f whichcommunicates with the bore 2. j j y Both ofthe ports`10 andV 11 arecircular in cross section, and the advantages of this shape will bepointed out hereinafter.-l j Y f l2fdenotespacking materialk in thesleeve 4; and surrounding the valve stein, the said material beingheldin place and compressed by means of a gland 13 through whichthevalve stem'extends, the said stem being held against rotation inthe-sleeve4 by means of a pin 14 extending through the gland and havingits endsl mounted infvertical slots 15 and 16 in the said stemand in the-inner wall of the sleeve 4,respectively. j .y 1;7denotesthe uppersleeve portion and 18 the lowercap portion of a yoke cap, said portionsbeing connected by yoke arms 19. The cap `portion 18' comprises a`depending internally"threaded skirt :which isadaptod to be threaded onthe upperH end of the sleeve 4 and a transverse partition 18a having anaperture therethrough for the stem 8, said partition being adapted toengage the gland 13 and cause the same to compact the packing 512. Theupper portion 17 ofthe yoke capis provided with abore forthe upper endof the valve stem land also with a transverse bore 17@L which receivesar set screw' 20 which, when tightened, will cooperate with the pin 1lito hold the valvcstem against rotation by the operation of the controlnut 21 which is threaded upon the stem S between the parts 17 and 18 `ofthe vyoke cap. `This i control nut is cfa width to be receivedbetweenthe upper and-.lower portionsA of vthe yoke cap andfhasupper landlower lthrust surfaces adapted to engage vcorresponding thrust'surfacesen the bottom of the part l? and lonthe `,top ofv the part 13,-therebyto facilitate the vertical adjustments of the valve. stem, byA said nut.

v, The threadson tnevalve stem and within the boreA of theicontrol nutare very tine,

whereby the oil supplied through the passage formed by the ports 10 andl1 may, if desired, be varied by a few drops per minute. The iinethreads provide in effect a micrometer motion of the stein 8. Theadjustment of the stem 8 does 'not alter the cross-sectional area of theopening between the channel 8a andthe duct 2. rllhis will be seen by anexamination of Figures 3 and 4. The stem 8 is there shown in its lowest`position and the ports 10 and 'l1 register, constituting the position ofmaximum flow of oil through these ports. To shut off the iiow throughports l1 and l() the stem 8 is raised. This operation evidently -doesnot change appreciably the ,flow through the duct 2 since by reason ofthe rectangular channel 8L the openings between the channel Si1 and thebore 2 remain ot the same cross-sectional area and since thecross-sectional arca 'ot Athe opening` between the ports l0 and ll isalways small as compared with the cross-sectional area of the streamthrough 2 and Sn. The Bore 2 constitutes a by-pass with respect to theopenings l0, 11 (through which the oil that delivered to the furnacepasses).

'A valve of this character is particularly useful in systems orapparatus `for supplying oil to burners, and the construction describedenables the valve stem to be set for the max imum desired fire, afterwhich the yoke cap may be locked in place by means of the set screw 2O-rwhich will prevent reciprocation of' the valve stem by the control nut2l.

It will be observed that, in all adjustments oi the valve stem 8,'alenticular opening will be provided between the ports l() and. 1l forthe flow of the oil. This continuous lenticular cross-sectional area isparticularly citt cient, not only in enablinga sensitive control to beobtained, but also in the mattei' of preventing the clogging of suchopening and ot the passage formed by said ports by the liquid'flowingtherethrough. This lenticular cross sectional area is not onlydistinguishable from the diffused area which is provided between aneedle valve and its seat, but se,- cures results which cannot beobtained by a port or passage having such .diffused area. By alenticulai section is understood an area` which is common to twointersectingr circles. i

The openingV between the ports l() and 11, as well as the said ports, iscontinuouslII washed by the lowing'oil, which `tends `to prevent anyaccumulation of sediment. Furthermore, the sediment contained in astream of liquid flowing through a passage tends to seek the center ofsuch stream; and, asthe opening formed by adjusting the stem withreference to the porti() islocated at one side of the center of thestream, it lwill receive a minimum ot suchsediment.V The sediment, iflight,tends tomove-along the-line'otgreatest velocity, that is:4therenter 4the chan.-

nel, or if heavy tends to go to the bottom. rl`he port ll is shown inFig. 4 as located to one side of a vertical plane bisecting therectangle 8a. Hence the oil that trickles through the small opening llis not likely to be clogged with either heavy or light sediment.

As will be seen from Fig. 3 of the drawing, because the channel 8aextends below the bore 2 and has its upper end substantially flush withthe top of the bore when in this position, the adjustment ofthe valvestem 8 upwardly by the control nut 21, to vary the effective passagewaythrough the ports 10 and 1l will not result in varying the effectivesize of the passageway through the bore 2 and channel 8a. The raising ofthe stem 8 does not affect the area of the opening between the channel 8and the bore 2. `The raising of the stem creates an upper oil pocket ofincreasing volume, ybut it also` decreases the volume of the lower oilpocket. Hence the resistance to the 'How oiE oil parallel to the bore 2is not seriously changed;

T he valve described herein is extremely efiicient in operation, forrthe reasons set iorth, and is comparatively cheap of production.

'Having thus described my invention, what I clainiis: y

l. VVAfvalve comprising a body having a connection and a verticalguideway for a valve stein andl ai, port. extending from said connectionto said guideway, a valve stem slidably mounted insaid guideway andhavingk a portv adapted to register with the iirst mentioned port, thesaid valve body having a sleeve providing .a chamber Vsurrounding theupper portion of the valve stem, a yoke caphaving a guideway for theupper end of saidstem 'and being threaded on said sleeve, packingfwithinthe sleeve surrounding the valve stein, a packing gland in said slee-veadaptedto beengaged by said yoke cap, there being yyoke/arms connectingthe upper and lower portions of said cap and the said stem beingprovided with a threaded portion extending` between'the upper and lowerportions of the yoke cap, a nut on saidV stem between the upper andlower portions of said cap, and means for holding the stem againstrotation while` being reciprocated by said nut.V

2. A valve'comprising a body having a connection and a guideway for avalve stem anda port extending from said connection to saidguideway, avalve stem slidably mounted inV sa'idvguideway and having av portadapted to register with the first-mentioned port, a yoke cap connectedto 'said body and having a gu'idewayffor the upper end of said stem,there 4being yoke arms :connecting the upper and', lowerY portionsof-sa'id cap', the said stein b'eingprovided with a threaded portionex-A tcns of theyokecap ',A ajmit on.A s'iad stem 'be tween-the-upperan' l"Iovve'r portionsrof'sad .tend-ingx etween, .the- .upperl and-lowerlporcap, and means for holding the stem against rotation While beingreciprocated by said nut.

3. A valve comprising a body having a port for the flow of liquid and aguidevvay intero secting` thesaid port, a valve stem mounted in saidguideway and having a port adapted to register with the first mentionedport, the said valve body having a sleeve extending therefrom providinga chamber surrounding the valve stem, there being packing in saidchamber, a gland surrounding the valve stein and adapted to engage thesaid packing, the valve stem and the inner Wall of the sleeve beingslotted, a pin extending through the gland and having its ends mountedin said slots, a cap threaded on said sleeve and surrounding the stemand adapted to force the gland against said packing, the said stem beingprovided with a thread, and a control nut on the threaded part of saidstem arranged to engage said cap. Y

4. A valve comprising a body having a port for the flow of liquid and aguideivay intersecting the said port, a valve stem mounted insaidguideivay and having a port adapted to register With the iirst mentionedport, the said valvebody having a sleeve extending` therefrom providinga chamber surrounding the valve stein, there being packing in saidchamber, a gland surrounding the valve stem and adapted'to engage thesaid packing, the valve stein and the inner Wall ot the sleeve beingslotted, a pin extending through the gland and having its ends mountedin said slots, a cap threaded on said sleeve and surrounding the steinand adapted to foi-cc the gland against said packing, the said capcon'iprising yoke arms extending from lsaid stein between the upper andlower portions of the said cap, said upper and lower portionsbeingvprovided with thrust surfaces for said nut.

5. A valve comprisingl a body having a port for the liow of liquid and aguideWay intersecting the said port, a valve stein mounted in saidguideivay and having a port adapted to register with the first mentionedport, the said valve body having a sleeve extending therefrom providinga chamber surrounding the valve stem, there being packing insaidchamber, a gland surrounding the valve stem and adapted to engage thesaid packing, the valve stem and the inner Wall of the sleeve beingslotted, a pin extending through the gland and having its ends mounti edin'said slots, a cap threaded on said sleeve and surrounding the steinand ,adapted to orcethe gland against said packing, anda control nutthreaded on said stein to Vcooperate With said cap for moving the steinin said guideway.

by the position of the valve stem, said valve l stem and said valve bodyhaving ports of substantially circular cross-section for connecting saidchannel and said second outlet by means of an opening formed by theintersection of the contacting adjacent ends of the Walls of the tWoports, and means for reciprocating the valve stem whereby the area ofopening may be minutely regulated.

7. A valve comprising a valve body having a duct for the continuous flowof oil, a guide intersecting said duct, a valve steminounted forreciprocation in said guide and having a channel forming a part of saidduct, said valve body having also an outlet for receiving oil from saidcontinuous flow in amounts variable by movement of the valve stem, saidchannel and said outlet orivariable oil flow being interconnected byports in said stem and in said valve bodyr respectively by means of theopening formed by the intersection of the adjacent ends of the Walls ofthe tWo ports, said opening being to one side of the axis of the ductfor continuous flow whereby tendency to clogging the ports by dbris fromthe main stream .is reduced.

In testimony whereof, I hereunto signature.

JOHN W.V CANNON.k

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